carroll



(No Model.)

G. D. CARROLL.

METHOD OF DRYING PRINTED SHEETS.

No. 273,816. Patented Mar.13.1883.

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UNITED STATES GEORGE D. CARROLL, OF YONKERS,

NEW YORK, ASSIGNOR TO MANFRED C. CARROLL, OF SAME PLACE.

METHOD OF DRYING PRINTED SHEETS.

SPECIFICATION forming part of Letters Patent No. 273,816, dated March13, 1883. Application filed November 14, 1882. (No model.)

To all whom it may concern Be it known that I, GEORGE D. CARROLL,

of Yonkers, in the State of New York, have invented an Improvement inMethods of Drying Printed Sheets, of which the following is adescription.

In printing bank-notes and similar articles the sheets of paper havebeen placed in frames or hung up and exposed to heat for the purpose ofsetting the ink. Sheets of paper that are printed with types have beenplaced between sheets of card-board and subjected to pressure to smooththe sheets and remove the raised type-impressions produced by the heavypressure of type in printing.

My invention is made for the purpose of hardening the ink, and therebylessening the time consumed in drying the work, so that the printedsheets may be delivered in a perfect condition more quickly thanheretofore.

In the printing of wedding-cards, invitations, notices, and allplate-work, also lithographic printing and letter-press type-printing,it has heretofore been usual to spread out or interleave the printedsheets and allow the ink to dry by atmospheric action. This mode ofdrying is very slow, and under some atmospheric conditions the ink doesnot harden in less than twenty-four to forty-eight hours. Theconsequence is that work cannot be finished and delivered in time, orelse it is sent off before the ink is properly hardened, causing them tolay off and blur, disfiguring the beauty of the printing. Efforts havebeen made to harden theink of plate-printing work of the characterindicated by placing the same in heated chambers, such as used forbanknotes and similar printing; but all such efforts have failed,because the heat curls up the cards and printed sheets and disfiguresthem, so that they are not adapted to the market.

I print the wedding-invitations, cards, or other plate printing, alsolithographic printing from stone, also letter-press work from Type,electrotype, wood, or other material, in the usual manner; but insteadof spreading the same out to dry, either by the ordinary or artificialheat, I. place the same between sheets of thick papersuch asstra\v-board andlay the sheets and boards. one on the other. I thenplace the pile into a steam or other heated oven, care being taken notto squeeze or compress the sheets, and only to have sufficientweight ofstraw orother boards in the pile, or weights upon the pile, to preventthe sheets or cards from curling up. This gives opportunity for the heatto penetrate freely and dry the ink, and for the vapors to pass off fromthe ink.

By this improvement I am able to dry the ink much more rapidly thanheretofore, and at the same time to keep the printed cards or sheets ina flat condition, so that they are ready for delivery in a few hoursafter printing.

In carrying out my invention I make use of an oven such as shown inFigure l of the annexed drawings, whereina ct are the sides, I) thebottom, and c the top, of the oven. Suitable doors are also provided. Eisa shelf in said oven, which by preference is perforated metal, and fis a range of steam heating-pipes. The heat may be derived from anysuitable source. The bottom board, It, is to receive upon it the thesheets as the pile is made.

Fig. 2 is a plan view, illustrating how cards may be laid upon thesheets as they are successively piled up. The top board, in, serves tokeep the respective sheets in place, and this, with the bottom board,70, allows the workman to lift the pile of sheets into or out of theoven, or to insert the pile during the drying operation.

I claim as my invention- The method herein specified of hardening theink on printed sheets, and at the same time preventing the cards orpaper warping, curling, or buckling, consisting in laying the printedsheets or cards upon large sheets of straw-board or other suitablematerial, covering the same with a second sheet and making a pile, thenintroducing the same into a heated chamber, substantially as set forth.

Signed by me this 10th day of November, A. D. 1882.

GEO. D. CARROLL.

Witnesses Gno. T. PINOKNEY, WILLIAM G. Mom.

sheets of straw-board or similar thick paper or plates, the printedmatter being laid between

